Figure 11.

a–d) Facile and robust TENGs assembled using off‐the‐shelf materials. Reproduced with permission.^{[ 82 ]} Copyright 2019, Elsevier. e–g) Freestanding flag‐type TENGs for harvesting high‐altitude wind energy from arbitrary directions. Reproduced with permission.^{[ 83 ]} Copyright 2016, American Chemical Society. h–j) PI aerogel film‐based TENGs. Reproduced with permission.^{[ 85 ]} Copyright 2018, American Chemical Society. k–p) Dual inductive and resonance effects‐controlled highly transparent PI‐based high‐output TENGs. Reproduced with permission.^{[ 87 ]} Copyright 2019, Wiley‐VCH.